The AI will generally know how to do diagnostics for any skill-level, so it should be able to identify what the child needs to work on. Diagnostic testing is not done in public schools. The teacher regurgitates a curriculum and if the kids don't get it (identified in testing), that's that. The teacher only helps students who already know how to self-diagnose (e.g, They know what they are not understanding and are willing to ask questions). Your average teacher in America has never been able to provide diagnostic testing to large classrooms. If you want to think about this differently, imagine a Doctor that can only help you if you already know what your issue is. That has been the state of the education system.

In your first comment I thought you were talking about teaching. Now It seems your main point is about diagnostics. I don’t dispute that both are intertwinned, but my reply to you was about „you can replace 90% of teachers“ with ai.

One of the strong areas of school is the in-person-interaction part of learning that can not be easily replaced by ai.

If I understand correctly you are proposing to cut the teaching staff in the typical schools in the US to 10%, this 10% are there to place the students in front of the ai that makes the kids smarter?

I was thinking not even that. I was thinking just a dedicated staff of proctors to ensure no cheating during exams. Along with that, we can introduce psychologists for social/psychological support. But yes, the K-12 teachers as we know them need to go as they are wildly inadequate given the current state of technology.